My players once used charisma and magic to basically trick/enslave some generic box to participate in everything for THE WHOLE CAMPAIGN. I kept trying to kill him and when that didn’t work I tried to make them feel bad about the situation because he had a family at home that had no idea where he was and when I finally managed to kill him they just brought him back from the dead. He was a level 4 night and they were level 18 when the campaign ended